Perhaps you should try some spelling variations:
segmentation techniques » augmentation techniques, imputation techniques
limitation techniques » imputation techniques, mitigation techniques, augmentation techniques
no2 segmentation » 3d segmentation
k limitation » _ limitations, co limitation
based no2 » based co, based n
based k » based _, based n, based 3d

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( learning-based no2 segmentation techniques ) or ( learning-based k limitation techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based no2 segmentation techniques ) OR ( learning-based k limitation techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based no2 segmentation techniques ) or ( learning-based k limitation techniques ))*.